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media: docs: ext-ctrls-codec: Document cyclic intra-refresh zero control value

In all drivers _CYCLIC_INTRA_REFRESH_MB default control value is zero which means that the macroblocks will not be intra-refreshed. Document this _CYCLIC_INTRA_REFRESH_MB control behaviour in control description.

Stanimir Varbanov committed 5 years ago

Commit ea9f9111 parent 1ac61fa1 file · +3 −1Browse files

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Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst+3−1
@@ -1174,7 +1174,9 @@ enum v4l2_mpeg_video_h264_entropy_mode - · 1173 unmodified lines
11741174 Cyclic intra macroblock refresh. This is the number of continuous
11751175 macroblocks refreshed every frame. Each frame a successive set of
11761176 macroblocks is refreshed until the cycle completes and starts from
1177− the top of the frame. Applicable to H264, H263 and MPEG4 encoder.
1177+ the top of the frame. Setting this control to zero means that
1178+ macroblocks will not be refreshed.
1179+ Applicable to H264, H263 and MPEG4 encoder.
11781180
11791181 ``V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE (boolean)``
11801182 Frame level rate control enable. If this control is disabled then